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L

- Lake Grace Land Conservation District
- Land Authority, Western Australian (LandCorp)
- Land Information Authority, Western Australian (Landgate)
- Land Surveyors Licensing Board
- Land Valuers Licensing Board
- Landstart Board
- Lane Poole Reserve Advisory Committee
- Law Compass
- Law Reform Commission of Western Australia
- Law Reporting Advisory Board
- Leeuwin Naturaliste National Park Advisory Committee
- Legal Aid Western Australia
- Legal Contribution Trust
- Legal Costs Committee
- Legal Practice Board
- Legal Practitioners Complaints Committee
- Legislative Assembly
- Legislative Council
- Leschenault Catchment Council
- Liquor Commission of WA
- Local Government Advisory Board
- Local Government and Regional Development, Department of
- Local Government Grants Commission, Western Australian
- Local Health Authorities Analytical Committee
- Lotteries Commission
- Lower Blackwood Land Conservation District Committee
- Lyndon Land Conservation District Committee